relay

Abstract

A relay comprising a pair of fixed contact leads, a movable contact assembly, a push rod assembly, a first anti-rotation assembly, and a second anti-rotation assembly. The movable contact assembly includes a movable contact, the ends of which along a first direction are used to contact or separate from a pair of fixed contact leads, the first direction being the direction in which the pair of fixed contact leads are arranged, the movable contact assembly having a first side and a second side provided opposite to each other along a third direction, the push rod assembly includes a contact bracket, the contact bracket having a first side wall and a second side wall provided opposite to each other along a third direction, the first side wall corresponding to the first side, the second side wall corresponding to the second side, the first anti-rotation assembly includes a first magnet connected to the first side and a second magnet connected to the first side wall, the opposing magnetic poles of the first and second magnets being the same magnetic poles, the second anti-rotation assembly includes a third magnet connected to the second side and a fourth magnet connected to the second side wall, the opposing magnetic poles of the third and fourth magnets being the same magnetic poles.

Description

Technical Field

[0001] Cross Reference This application claims the priority of the Chinese Patent Application with Application No. 202311189290.4 filed on September 14, 2023, and the entire content of said Chinese Patent Application is incorporated herein by reference.

[0002] The present application relates to the technical field of electronic control devices, and specifically relates to relays. Background Art

[0003] A relay is an electronic control device that includes a control system (also referred to as an input circuit) and a controlled system (also referred to as an output circuit), and is typically used in automatic control circuits. In practice, a relay is an "automatic switch" that controls a large current with a relatively small current. Therefore, it functions as automatic regulation, safety protection, and circuit conversion in circuits.

[0004] A high-voltage DC relay is a type of relay. A high-voltage DC relay in the conventional art includes a pair of fixed contact lead-out terminals, a movable assembly, a coil unit, and a magnetic path part. The movable assembly includes a movable contact assembly, a push rod assembly, and an elastic assembly, wherein the movable contact assembly is mounted to the push rod assembly via the elastic assembly. The magnetic path part includes a fixed iron core and a movable iron core, the fixed iron core is fixedly arranged in the relay, and the movable iron core is connected to the push rod assembly. When the coil unit is energized, the fixed iron core generates a magnetic attraction force to attract and drive the movable iron core to move, thereby causing the push rod assembly to move together in conjunction with the movable contact assembly, so as to achieve contact closing.

[0005] However, during the relay's operation, the movable contact assembly tends to rotate around the axis of the push rod relative to the push rod. This causes contact and friction between the movable contact assembly and the contact bracket of the push rod assembly, generating a loud metallic noise. Furthermore, the frictional loss between the movable contact assembly and the contact bracket causes the deflection angle of the movable contact assembly to gradually increase, affecting the contact position between the movable contact assembly and the fixed contact lead end, leading to instability in contact resistance. In addition, friction between the movable contact assembly and the contact bracket easily generates metal particles, and if these metal particles fall onto the contact surface, contact resistance tends to increase, potentially preventing the relay from conducting. [Overview of the project]

[0006] The embodiments of this application provide a relay that solves the problem of the tendency of movable contact assemblies to rotate in the prior art.

[0007] The relay according to the embodiment of the present application is It includes a pair of fixed contact lead-outs, a movable contact assembly, a push rod assembly, a first anti-rotation assembly, and a second anti-rotation assembly, The movable contact assembly includes a movable contact, the ends of which the movable contact is used to contact or separate from a pair of fixed contact leads, the first direction being the direction in which the pair of fixed contact leads are positioned, the movable contact assembly having a first side and a second side facing each other along a third direction, the second direction being defined as the direction of motion of the movable contact, and the first, second, and third directions being perpendicular to each other. The push rod assembly includes a contact bracket, the contact bracket having a first side wall and a second side wall provided opposite to each other along the third direction, the first side wall corresponding to the first side surface, and the second side wall corresponding to the second side surface. The first anti-rotation assembly includes a first magnet connected to the first side and a second magnet connected to the first side wall, wherein the opposing magnetic poles of the first and second magnets are of the same name. The second anti-rotation assembly includes a third magnet connected to the second side and a fourth magnet connected to the second side wall, wherein the opposing magnetic poles of the third and fourth magnets are of the same name.

[0008] In some embodiments of the present application, the first side wall has a first inner surface facing the movable contact assembly and a first outer surface facing away from the first inner surface, The second magnet is connected to the first inner surface or the first outer surface.

[0009] In some embodiments of the present application, the second side wall has a second inner surface facing the movable contact assembly and a second outer surface facing away from the second inner surface, The fourth magnet is connected to the second inner surface or the second outer surface.

[0010] In some embodiments of the present application, the first magnet, the second magnet, the third magnet, and the fourth magnet are permanent magnets.

[0011] In some embodiments of the present application, the first magnet, the second magnet, the third magnet, and the fourth magnet are flat in shape, and the thicknesses of the first magnet, the second magnet, the third magnet, and the fourth magnet are equal to each other.

[0012] In some embodiments of the present application, the push rod assembly further includes a rod portion and a base connected to one end of the rod portion in the axial direction. The contact bracket is connected to the base and forms a space for housing the movable contact assembly enclosed by the contact bracket and the base.

[0013] In some embodiments of the present application, the contact bracket further includes a bottom wall, the ends of the bottom wall along the third direction being integrally connected to one end of the first side wall and one end of the second side wall, the contact bracket, the rod portion and the base being connected by injection molding, and the base covering the bottom wall and one end of the first side wall and one end of the second side wall, The push rod assembly further includes a stopper piece, the stopper piece being connected to the other ends of the first and second side walls, and the stopper piece being provided on one side of the movable contact assembly facing the fixed contact lead end.

[0014] In some embodiments of the present application, the contact bracket further includes a top wall, the top wall having both ends along the third direction integrally connected to one end of the first side wall and the second side wall, respectively. The other ends of the first and second side walls are engaged with the base, respectively.

[0015] In some embodiments of the present application, the relay further includes a first magnetic conductor, the first magnetic conductor being provided on one side of the movable contact toward the fixed contact lead-out end.

[0016] In some embodiments of the present application, the movable contact assembly further includes a second conductor, the second conductor being fixedly connected to one side of the movable contact facing away from the fixed contact lead end, and the second conductor being used to form a conductor circuit with the first conductor.

[0017] In some embodiments of the present application, the relay is The present invention further includes an elastic assembly, the elastic assembly being connected to the movable contact assembly and the push rod assembly, and the elastic assembly being used to provide contact pressure.

[0018] One embodiment of the above application has at least the following advantages or beneficial effects.

[0019] In the relay according to the embodiment of the present application, due to the repulsive force generated between the first magnet and the second magnet and the repulsive force generated between the third magnet and the fourth magnet, the movable contact assembly is subjected to the action of the repulsive force on both sides along the third direction, thereby the movable contact assembly is held between the first side wall and the second side wall, which prevents rotation of the movable contact assembly relative to the push rod assembly, can avoid metal noise caused by contact and friction between the movable contact assembly and the first side wall as well as the second side wall, further ensures the consistency of the contact position between the movable contact assembly and the fixed contact lead-out end, and guarantees the stability of contact resistance. At the same time, since the movable contact assembly does not rotate relative to the push rod assembly, the risk of generating metal particles due to friction between the movable contact assembly and the contact bracket is greatly reduced, and the operational reliability of the relay product is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other features and advantages of the present disclosure will become more apparent by describing the exemplary embodiments in detail with reference to the accompanying drawings. [Figure 1] It is an exploded schematic view showing a relay according to an exemplary embodiment. [Figure 2] It is a planar schematic view showing a sealing unit according to an exemplary embodiment. [Figure 3] It is a cross-sectional view taken along the cutting line A-A in Fig. 2, showing a state where the movable contact assembly and the fixed contact lead-out end are not in contact. [Figure 4] It is a cross-sectional view taken along the cutting line B-B in Fig. 2, showing a state where the movable contact assembly and the fixed contact lead-out end are not in contact. [Figure 5] It is a cross-sectional view taken along the cutting line A-A in Fig. 2, showing a state where the movable contact assembly and the fixed contact lead-out end are not in contact. [Figure 6] It is a cross-sectional view taken along the cutting line B-B in Fig. 2, showing a state where the movable contact assembly and the fixed contact lead-out end are not in contact. [Figure 7]It is a cross-sectional view showing a movable assembly according to another exemplary embodiment. [Figure 8] It is a cross-sectional view showing a movable assembly according to still another exemplary embodiment. [Figure 9] It is a cross-sectional view showing a movable assembly according to yet another exemplary embodiment. Description of Reference Numerals

[0021] 1, Relay 10, Case 11, First Housing 11a, Exposure Hole 12, Second Housing 20, Coil Unit 21, Coil Bobbin 22, Coil 30, Arc-extinguishing Unit 31, Arc-extinguishing Magnet 32, Yoke Clamp 40, Sealing Unit 1000, Contact Container 1001, Contact Chamber 1002, First Through Hole 1100, Insulating Cover 1110, Ceramic Cover 1120, Flange Member 1200, Yoke Plate 1210, Second Through Hole 2000, Fixed Contact Lead End 3000, Movable Assembly 3100, Movable Contact Assembly 3100a, First Side Surface 3100b, Second Side Surface 3110, Movable Contact 3200, Push Rod Assembly 3210, Push Rod 3211, Base 3212, Rod Portion 3220, Contact Bracket 3221, Bottom Wall 3222a, First Side Wall 3222b, 2nd side wall 3223, First inner surface 3224, First outer surface 3225, second inner surface 3226, second outer surface 3230, stopper piece 3300, Elastic assembly 4000, magnetic circuit section 4300, fixed iron core 4310, through hole 4400, movable iron core 4500, return member 5000, metal cover 6100, First magnetic conductor 6200, Second magnetic conductor 100, First anti-rotation assembly 110, First Magnet 120, The second magnet 200, Second anti-rotation assembly 210, The third magnet 220, the fourth magnet. [Modes for carrying out the invention]

[0022] The exemplary embodiments will be described more comprehensively below with reference to the attached drawings. However, the exemplary embodiments can be carried out in various forms and should not be construed as being limited to the embodiments described herein. On the contrary, by providing these embodiments, this application will be made comprehensive and complete, and the ideas of the exemplary embodiments will be fully conveyed to those skilled in the art. In the drawings, the same reference numerals indicate the same or similar components, and therefore their detailed descriptions will be omitted.

[0023] As shown in Figure 1, the relay 1 according to the embodiment of the present invention includes a case 10, a coil unit 20, an arc extinguishing unit 30, and a sealing unit 40. The sealing unit 40 is provided inside the case 10, and the top of the fixed contact lead-out end of the sealing unit 40 is exposed on the outer surface of the case 10 through the exposed hole 11a of the case 10. Both the coil unit 20 and the arc extinguishing unit 30 are installed inside the case 10.

[0024] It should be understood that the terms “including” and “having” in the embodiments of this application, and any variations thereof, are intended to mean non-exclusive inclusion. For example, a process, method, system, product, or apparatus comprising a series of steps or units may, but is not limited to the listed steps or units, optionally include steps or units not listed, or optionally further include other steps or assemblies specific to those processes, methods, products, or apparatus.

[0025] As an example, case 10 includes a first housing 11 and a second housing 12, which are connected to each other to form a chamber for housing a coil unit 20, an arc extinguishing unit 30, and a sealing unit 40. In the embodiment of the present application, an exposed hole 11a is provided in the first housing 11.

[0026] The arc extinguishing unit 30 is used to extinguish the arc generated between the fixed contact lead-out end and the movable contact of the sealing unit 40.

[0027] As an example, the arc extinguishing unit 30 includes two arc extinguishing magnets 31. The arc extinguishing magnets 31 may be permanent magnets, and each arc extinguishing magnet 31 may be substantially rectangular parallelepiped in shape. The two arc extinguishing magnets 31 are each installed on either side of the sealing unit 40 and are installed facing each other along the longitudinal direction of the movable contact.

[0028] By providing two opposing arc-extinguishing magnets 31, a magnetic field can be formed around the fixed contact lead-out end and the movable contact. Consequently, the arc generated between the fixed contact lead-out end and the movable contact is stretched in a direction away from each other, thereby achieving arc extinguishing.

[0029] The arc extinguishing unit 30 further includes two yoke clamps 32, which are positioned corresponding to the locations of the two arc extinguishing magnets 31. The two yoke clamps 32 orbit the sealing unit 40 and the two arc extinguishing magnets 31. This design, in which the yoke clamps 32 orbit the arc extinguishing magnets 31, prevents the magnetic field generated by the arc extinguishing magnets 31 from diffusing to the outside and affecting the arc extinguishing effect. The yoke clamps 32 are made of a soft magnetic material. Soft magnetic materials include, but are not limited to, iron, cobalt, nickel, and their alloys.

[0030] As shown in Figures 2 to 6, the sealing unit 40 includes a contact container 1000, a pair of fixed contact lead-outs 2000, a movable assembly 3000, and a magnetic path section 4000.

[0031] The contact container 1000 is a fixed component that houses the contact assembly and is a device that mainly consists of a housing and has a chamber. The contact container 1000 can be constructed by connecting multiple components in a predetermined assembly method.

[0032] The contact container 1000 includes a contact chamber 1001 inside. The contact container 1000 may also include an insulating cover 1100 and a yoke plate 1200, the insulating cover 1100 being positioned to cover one side surface of the yoke plate 1200, and the contact chamber 1001 being jointly enclosed by the insulating cover 1100 and the yoke plate 1200.

[0033] The insulating cover 1100 includes a ceramic cover 1110 and a flange member 1120. The ceramic cover 1110 is connected to the yoke plate 1200 via the flange member 1120. The flange member 1120 may be a metal member exhibiting an annular structure, such as an iron-nickel alloy, and one end of the flange member 1120 is connected to the opening edge of the ceramic cover 1110 by methods such as laser welding, brazing, resistance welding, or bonding. The other end of the flange member 1120 is similarly connected to the yoke plate 1200 by methods such as laser welding, brazing, resistance welding, or bonding. By providing the flange member 1120 between the ceramic cover 1110 and the yoke plate 1200, the connection between the ceramic cover 1110 and the yoke plate 1200 can be facilitated.

[0034] The contact container 1000 further comprises a pair of first through holes 1002, the first through holes 1002 communicating with the contact chamber 1001. The first through holes 1002 are used for drilling a fixed contact lead end 2000 into the first through holes 1002. In the embodiment of the present application, the first through holes 1002 are provided in the ceramic cover 1110.

[0035] A pair of fixed contact leads 2000 are connected to the ceramic cover 1110 of the contact container 1000, and at least a portion of each fixed contact lead 2000 is located within the contact chamber 1001. Of the pair of fixed contact leads 2000, one functions as a terminal into which current flows, and the other as a terminal into which current flows.

[0036] A pair of fixed contact lead-outs 2000 are drilled to correspond to a pair of first through-holes 1002 and are connected to the ceramic cover 1110, for example, by welding.

[0037] The bottom of the fixed contact lead-out end 2000 functions as a fixed contact, and the fixed contact may be provided integrally or separately at the bottom of the fixed contact lead-out end 2000.

[0038] Continuing to refer to Figures 3 to 6, the movable assembly 3000 includes a movable contact assembly 3100, a push rod assembly 3200, and an elastic assembly 3300. The movable contact assembly 3100 is housed within the insulating cover 1100 and is attached to the push rod assembly 3200 via the elastic assembly 3300. Both ends of the movable contact assembly 3100 along a first direction D1 are used to contact or separate from a pair of fixed contact lead-out ends 2000. The first direction D1 is the orientation of the pair of fixed contact lead-out ends 2000.

[0039] If one pair of fixed contact leads 2000 and one movable contact assembly 3100 are considered as one combination, the relay according to the embodiment of the present application may include multiple combinations.

[0040] The movable contact assembly 3100 may include a movable contact 3110, the ends of which along the first direction D1 are used to contact or separate from a pair of fixed contact lead-out ends 2000.

[0041] Please understand that the number of movable contacts 3110 may be one or more.

[0042] Each movable contact 3110 may include a movable contact body and movable contacts provided at both ends of the movable contact body. The movable contacts may be independent components or may be connected to the movable contact body. Naturally, the movable contacts may be integrally molded onto the movable contact body.

[0043] In the embodiment of the present application, the movable contact assembly 3100 includes two movable contacts 3110 arranged in parallel. One end of the two movable contacts 3110 is used to make contact with or separate from the fixed contact of one fixed contact lead-out end 2000, and the other end of the two movable contacts 3110 is used to make contact with or separate from the fixed contact of the other fixed contact lead-out end 2000. Furthermore, one end of the two movable contacts 3110 forms two contact points with one fixed contact lead-out end 2000, and the other end of the two movable contacts 3110 forms two contact points with the other fixed contact lead-out end 2000.

[0044] In other embodiments, the number of movable contacts 3110 may be one, three, four, five, or the like.

[0045] It can be understood that the movable contact assembly 3100 includes multiple movable contacts 3110, and both ends of the multiple movable contacts 3110 along the first direction D1 are in contact with or separated from a pair of fixed contact leads. Since the multiple movable contacts 3110 are not restricted from each other, both ends of the multiple movable contacts 3110 along the first direction D1 are in contact with a pair of fixed contact leads 2000, after which a reliable parallel circuit is formed. The number of contacts formed by the multiple movable contacts 3110 and one fixed contact lead 2000 is two or more, thereby achieving a current shunting effect. Furthermore, based on the principle that the magnitude of the electric repulsion force is proportional to the square of the current, the magnitude of the electric repulsion force of each contact is significantly reduced, contributing to improved short-circuit prevention performance and increasing the reliability of the relay.

[0046] Furthermore, the movable contact assembly 3100 may further include a second magnetic conductor 6200, which is fixedly connected to one side of the movable contact 3110 facing away from the fixed contact lead-out end 2000. The function of the second magnetic conductor 6200 will be described later.

[0047] Here, the number of movable contacts 3110 and second magnetic conductors 6200 included in the movable contact assembly 3100 may correspond to each other. Specifically, if there is one movable contact 3110, there is also one second magnetic conductor 6200, and if there are multiple movable contacts 3110 (including two), there are also multiple second magnetic conductors 6200.

[0048] In other embodiments, the number of movable contacts 3110 and second conductors 6200 do not have to correspond to each other. For example, a movable contact assembly 3100 includes one movable contact 3110 and two second conductors 6200, the movable contact 3110 being provided with via holes, each second conductor 6200 having a U-shaped structure, and two adjacent sides of two U-shaped structures being inserted into the same via hole.

[0049] As shown in Figures 3 to 6, the direction of motion of the movable contact 3110 is defined as the second direction D2, and the direction perpendicular to the first direction D1 and the second direction D2 is defined as the third direction D3. The push rod assembly 3200 includes a push rod 3210, a contact bracket 3220, and a stopper piece 3230. The push rod 3210 includes a base 3211 and a rod portion 3212, the base 3211 being connected to one axial end of the rod portion 3212. The contact bracket 3220 includes a bottom wall 3221, a first side wall 3222a, and a second side wall 3222b, the first side wall 3222a and the second side wall 3222b being arranged opposite each other along the third direction D3. One end of the first side wall 3222a and the second side wall 3222b are integrally connected to the side edges of the bottom wall 3221 along the third direction D3, respectively, and the other ends of the first side wall 3222a and the second side wall 3222b are connected to the stopper piece 3230. The movable contact assembly 3100 is mounted via the elastic assembly 3300 within the space enclosed by the contact bracket 3220 and the base 3211.

[0050] Here, the contact bracket 3220, the rod portion 3212, and the base 3211 are connected by injection molding, and the base 3211 covers the bottom wall 3221, one end of the first side wall 3222a, and one end of the second side wall 3222b.

[0051] The elastic assembly 3300 is provided between the movable contact assembly 3100 and the base 3211 and provides contact pressure to apply an elastic force to the movable contact assembly 3100 that moves toward the stopper piece 3230.

[0052] It should be understood that the elastic assembly 3300 is used to flexibly support the movable contact assembly 3100 and to provide contact pressure.

[0053] Naturally, in other embodiments, the pushrod assembly 3200 may employ other structures. For example, the contact bracket 3220 of the pushrod assembly 3200 is inverted U-shaped and includes a top wall and two side walls (the two side walls corresponding to the first side wall 3222a and the second side wall 3222b in the above embodiment, respectively), with one end of each side wall integrally connected to both side edges of the top wall along the third direction D3, and the other ends of each side wall engaged with the base 3211.

[0054] If there are multiple movable contacts 3110, the multiple movable contacts 3110 are arranged in parallel along the third direction D3.

[0055] Referring to Figures 3 through 6, the yoke plate 1200 is provided with a second through-hole 1210, which penetrates two opposing sides of the yoke plate 1200 along its thickness direction and communicates with the contact chamber 1001 of the contact container 1000. The rod portion 3212 is movably mounted along its axial direction and has the second through-hole 1210 drilled into it. A base 3211 at one axial end of the rod portion 3212 is provided within the contact chamber 1001.

[0056] The sealing unit 40 further includes a metal cover 5000, which is connected to one side of the yoke plate 1200 facing away from the insulating cover 1100, and is positioned to cover a second through-hole 1210 on the yoke plate 1200. A chamber is formed, enclosed by the metal cover 5000 and the yoke plate 1200, for housing the fixed core 4300 and the movable core 4400 of the magnetic path section 4000.

[0057] Referring back to Figure 1, the coil unit 20 includes a coil bobbin 21 and a coil 22, the coil bobbin 21 being hollow cylindrical and made of insulating material. A metal cover 5000 is drilled inside the coil bobbin 21. The coil 22 circulates around the coil bobbin 21.

[0058] As shown in Figures 3 to 6, the magnetic path section 4000 includes a fixed core 4300, a movable core 4400, and a return member 4500. The fixed core 4300 is fixedly provided within the metal cover 5000, and a portion of the fixed core 4300 extends into the second through hole 1210. The fixed core 4300 has a through hole 4310, which is positioned to correspond to the second through hole 1210 and is used to drill the rod portion 3212 into the through hole 4310. The movable core 4400 is movably provided within the metal cover 5000, and the movable core 4400 and the fixed core 4300 are positioned opposite each other in the axial direction along the rod portion 3212. The movable core 4400 is connected to the rod portion 3212 and is used to be attracted to the fixed core 4300 when the coil 22 is energized. The movable core 4400 and the rod section 3212 can be connected by screwing, crimping, welding, or other means.

[0059] The return member 4500 is located inside the metal cover 5000 and is provided between the fixed core 4300 and the movable core 4400. It is used to return the movable core 4400 when the power to the coil 22 is turned off. The return member 4500 may be a spring and is externally fitted to the outside of the rod portion 3212.

[0060] When coil 22 is energized, the fixed core 4300 attracts the movable core 4400 and moves it upward, and the movable core 4400 can be driven to move the push rod assembly 3200 upward via the rod portion 3212. When the movable contact 3110 comes into contact with the fixed contact lead end 2000, the movable contact 3110 is blocked by the fixed contact lead end 2000, but the rod portion 3212 and base 3211 continue to move upward until overtravel is complete.

[0061] During the overtravel process, the base 3211 presses against the elastic assembly 3300, and after being pressed, the elastic assembly 3300 can provide an elastic force to the movable contact assembly 3100 to provide contact pressure.

[0062] Referring further to Figures 4 and 6, the relay 1 further includes a first magnetic conductor 6100, the first magnetic conductor 6100 being fixedly connected to one side surface of the stopper piece 3230 facing the movable contact assembly 3100, and the first magnetic conductor 6100 being located on one side of the movable contact assembly 3100 facing the fixed contact lead-out end 2000.

[0063] What can be understood is that after the movable contact 3110 is energized, the first magnetic conductor 6100 becomes magnetized, creating an attractive force on the movable contact 3110 in the direction of contact closing. This attractive force resists the electric repulsive force generated by the short-circuit current between the movable contact 3110 and the fixed contact lead-out end 2000, preventing the movable contact 3110 and the fixed contact lead-out end 2000 from being repelled, thereby achieving the objective of preventing short circuits.

[0064] Here, if the movable contact assembly 3100 includes a plurality of movable contacts 3110 arranged in parallel, the number of first conductors 6100 may be multiple, and the number of first conductors 6100 corresponds to the number of movable contacts 3110, and each of the plurality of first conductors 6100 is located on one side of the plurality of movable contacts 3110 facing the fixed contact lead-out end 2000.

[0065] Naturally, in other embodiments, if the movable contact assembly 3100 includes a plurality of movable contacts 3110 arranged in parallel, the number of first magnetic conductors 6100 may be one, and the first magnetic conductor 6100 is provided spanning the plurality of movable contacts 3110 in the third direction D3.

[0066] Furthermore, if the movable contact assembly 3100 includes a movable contact 3110 and a second conductor 6200, the second conductor 6200 is fixedly connected to one side of the movable contact 3110 facing away from the fixed contact lead-out end 2000. The second conductor 6200 is used to form a conductor circuit with the first conductor 6100.

[0067] Here, the number of second magnetic conductors 6200 corresponds to the number of movable contacts 3110. In the embodiment of the present application, the number of second magnetic conductors 6200 is two, but is not limited to this. The two second magnetic conductors 6200 are each fixedly connected to one side facing away from the fixed contact lead-out ends 2000 of the two movable contacts 3110.

[0068] When both ends of the movable contact 3110 along the first direction D1 come into contact with a pair of fixed contact lead-out ends 2000, a current flows within the movable contact 3110, thereby forming a magnetic circuit that circulates around the movable contact 3110 between the first conductor 6100 and the second conductor 6200. When a short-circuit current passes through the movable contact 3110, an attractive force is generated between the first conductor 6100 and the second conductor 6200 along the direction of the contact pressure. This attractive force resists the electric repulsive force generated by the short-circuit current between the movable contact 3110 and the fixed contact lead-out ends 2000, preventing the movable contact 3110 and the fixed contact lead-out ends 2000 from being repelled.

[0069] The first magnetic conductor 6100 and the second magnetic conductor 6200 may be straight or U-shaped. It should be understood that the first magnetic conductor 6100 and the second magnetic conductor 6200 can be manufactured using soft magnetic materials such as iron, cobalt, nickel, and their alloys.

[0070] In another embodiment, the first magnetic conductor 6100 may be fixed to the contact container 1000 rather than being attached to the stopper piece 3230 of the push rod assembly 3200. In this case, the short-circuit prevention attraction force is transferred to the contact container 1000, and since the contact container 1000 is a fixed component, it does not require excessive coil holding force, and as a result the power consumption of the relay 1 coil and the volume of the relay 1 are reduced, improving the short-circuit prevention performance.

[0071] In a specific embodiment, the first magnetic conductor 6100 may be fixedly connected to the ceramic cover 1110 of the contact container 1000.

[0072] In another specific embodiment, the first magnetic conductor 6100 may be fixedly provided within the contact container 1000 via a fixing bracket (not shown). Specifically, the fixing bracket is provided within the contact container 1000 and is fixedly connected to the yoke plate 1200, and the first magnetic conductor 6100 is fixedly connected to the fixing bracket.

[0073] In yet another embodiment, the distance between the first conductor 6100 and the second conductor 6200 may be designed to be variable. Specifically, the distance between the first conductor 6100 and the second conductor 6200 can be adjusted according to the magnitude of the current, thereby changing the magnitude of the magnetic attractive force generated between the first conductor 6100 and the second conductor 6200, satisfying both the requirement for short-circuit prevention and the requirement for overload protection.

[0074] Preferably, the first conductor 6100 may include a plurality of stacked conductor pieces. It should be understood that the overall thickness of the first conductor 6100 can be increased by increasing the number of thin conductor pieces. On the other hand, because the conductor pieces are thin, they can be manufactured using thin strip material, resulting in low material costs and ease of handling. On the other hand, the number of conductor pieces can be flexibly adjusted according to the magnitude of the short-circuit current.

[0075] Continuing to refer to Figures 4 and 6, the movable contact assembly 3100 comprises a first side surface 3100a and a second side surface 3100b arranged relative to each other along the third direction D3. The first side surface 3100a corresponds to the first side wall 3222a of the contact bracket 3220, and the second side surface 3100b corresponds to the second side wall 3222b of the contact bracket 3220.

[0076] The relay 1 of the embodiment of the present application further includes a first anti-rotation assembly 100 and a second anti-rotation assembly 200. The first anti-rotation assembly 100 includes a first magnet 110 connected to a first side surface 3100a and a second magnet 120 connected to a first side wall 3222a, wherein the opposing magnetic poles of the first magnet 110 and the second magnet 120 are the same magnetic poles, that is, the magnetic poles of the side of the first magnet 110 facing the first side wall 3222a and the magnetic poles of the side of the second magnet 120 facing the first side surface 3100a are the same magnetic poles. The second anti-rotation assembly 200 includes a third magnet 210 connected to a second side surface 3100b and a fourth magnet 220 connected to a second side wall 3222b, wherein the magnetic poles of the third magnet 210 and the fourth magnet 220 facing each other are identical, that is, the magnetic poles of the side of the third magnet 210 facing the second side wall 3222b and the magnetic poles of the side of the fourth magnet 220 facing the second side surface 3100b are the same.

[0077] In the relay 1 of the embodiment of the present application, the opposing magnetic poles of the first magnet 110 and the second magnet 120 of the first anti-rotation assembly 100 are of the same name, so a repulsive force is generated between the first magnet 110 and the second magnet 120. The opposing magnetic poles of the third magnet 210 and the fourth magnet 220 of the second anti-rotation assembly 200 are of the same name, so a repulsive force is generated between the third magnet 210 and the fourth magnet 220, so the first magnet 110 and the third magnet 210 can each move. The first side surface 3100a and the second side surface 3100b of the movable contact assembly 3100 are connected to the second magnet 120 and the fourth magnet 220 are connected to the first side wall 3222a and the second side wall 3222b of the contact bracket 3220, respectively. As a result, the movable contact assembly 3100 is subjected to repulsive forces on both sides along the third direction D3, and the movable contact assembly 3100 is in a floating state between the first side wall 3222a and the second side wall 3222b. When the movable contact assembly 3100 rattles in the direction approaching the first side wall 3222a, the distance between the first magnet 110 and the second magnet 120 decreases, increasing the repulsive force. This repulsive force prevents the movable contact assembly 3100 from continuing to move toward the first side wall 3222a, thus avoiding the generation of metallic noise due to contact between the movable contact assembly 3100 and the first side wall 3222a. When the movable contact assembly 3100 rattles in the direction approaching the second side wall 3222b, the distance between the third magnet 210 and the fourth magnet 220 decreases, increasing the repulsive force. This repulsive force prevents the movable contact assembly 3100 from continuing to move toward the second side wall 3222b, thus avoiding the generation of metallic noise due to contact between the movable contact assembly 3100 and the second side wall 3222b.

[0078] Therefore, in the relay 1 of the embodiment of the present application, the movable contact assembly 3100 is subjected to repulsive forces in the third direction D3 by the repulsive force generated between the first magnet 110 and the second magnet 120, and the repulsive force generated between the third magnet 210 and the fourth magnet 220. This holds the movable contact assembly 3100 between the first side wall 3222a and the second side wall 3222b, preventing rotation from occurring relative to the push rod assembly and avoiding the generation of metallic noise due to contact and friction between the movable contact assembly 3100 and the first side wall 3222a and the second side wall 3222b. Furthermore, consistency of the contact position between the movable contact assembly 3100 and the fixed contact lead end 2000 is ensured, guaranteeing the stability of the contact resistance. At the same time, since the movable contact assembly 3100 does not rotate relative to the push rod assembly, the risk of generating metal particles due to friction between the movable contact assembly 3100 and the contact bracket 3220 is significantly reduced, ensuring the reliability of the relay product's operation.

[0079] In one embodiment, the first magnet 110, the second magnet 120, the third magnet 210, and the fourth magnet 220 are all permanent magnets.

[0080] Please understand that the opposing magnetic poles of the first magnet 110 and the second magnet 120 may be either north poles or south poles, and the opposing magnetic poles of the third magnet 210 and the fourth magnet 220 may be either north poles or south poles.

[0081] The opposing magnetic poles of the first magnet 110 and the second magnet 120 may be the same as, or different from, the opposing magnetic poles of the third magnet 210 and the fourth magnet 220. For example, in one specific embodiment, the opposing magnetic poles of the first magnet 110 and the second magnet 120 may be north poles, and the opposing magnetic poles of the third magnet 210 and the fourth magnet 220 may be north poles. In another specific embodiment, the opposing magnetic poles of the first magnet 110 and the second magnet 120 may be north poles, and the opposing magnetic poles of the third magnet 210 and the fourth magnet 220 may be south poles.

[0082] Referring again to Figures 4 and 6, the first side wall 3222a has a first inner surface 3223 facing the movable contact assembly 3100, and a first outer surface 3224 facing away from the first inner surface 3223. The second side wall 3222b has a second inner surface 3225 facing the movable contact assembly 3100, and a second outer surface 3226 facing away from the second inner surface 3225. The second magnet 120 is connected to the first inner surface 3223, and the fourth magnet 220 is connected to the second inner surface 3225.

[0083] In one embodiment, the first magnet 110, the second magnet 120, the third magnet 210, and the fourth magnet 220 are all flat plates, and their thicknesses are equal to each other.

[0084] Furthermore, the shapes of the first magnet 110, the second magnet 120, the third magnet 210, and the fourth magnet 220 may be rectangular or circular plates, but are not limited thereto.

[0085] Preferably, along the third direction D3, the orthographic projections of the first magnet 110, the second magnet 120, the third magnet 210, and the fourth magnet 220 on the first inner surface 3223 completely overlap, but are not limited to this.

[0086] In one embodiment, the first magnet 110 and the third magnet 210 may be connected to the movable contact assembly 3100 by means of adhesive, welding, etc. The second magnet 120 and the fourth magnet 220 may be connected to the contact bracket 3220 by means of adhesive, welding, etc.

[0087] Continuing to refer to Figures 4 and 6, if the movable contact assembly 3100 includes a plurality of movable contacts 3110 and a plurality of second conductors 6200, the two outermost second conductors 6200 have a first side surface 3100a and a second side surface 3100b, respectively.

[0088] In other embodiments, if the movable contact assembly 3100 includes only a plurality of movable contacts 3110, the two outermost movable contacts 3110 have a first side surface 3100a and a second side surface 3100b, respectively.

[0089] In other embodiments, the mounting positions of the four magnets (110, 120, 210, 220) may be as shown in Figure 7. Specifically, the first magnet 110 is connected to the first side surface 3100a of the movable contact assembly 3100, the second magnet 120 is connected to the first outer surface 3224, the third magnet 210 is connected to the second side surface 3100b of the movable contact assembly 3100, and the fourth magnet 220 is connected to the second outer surface 3226.

[0090] In yet another embodiment, the mounting positions of the four magnets (110, 120, 210, 220) may be as shown in Figure 8. Specifically, the first magnet 110 is connected to the first side surface 3100a of the movable contact assembly 3100, the second magnet 120 is connected to the first outer surface 3224, the third magnet 210 is connected to the second side surface 3100b of the movable contact assembly 3100, and the fourth magnet 220 is connected to the second inner surface 3225.

[0091] In another embodiment, the mounting positions of the four magnets (110, 120, 210, 220) may be as shown in Figure 9. Specifically, the first magnet 110 is connected to the first side surface 3100a of the movable contact assembly 3100, the second magnet 120 is connected to the first inner side surface 3223, the third magnet 210 is connected to the second side surface 3100b of the movable contact assembly 3100, and the fourth magnet 220 is connected to the second outer side surface 3226.

[0092] Please understand that the various embodiments / models provided in this application can be combined with each other as long as they do not create a contradiction, and therefore, examples of each are not provided here.

[0093] In the embodiments of this application, the terms “first,” “second,” and “third” are used for illustrative purposes only and are not intended to indicate or imply relative importance. The term “plural” refers to two or more unless otherwise explicitly limited. Terms such as “attach,” “connect,” “bond,” and “fix” are all understood broadly; for example, “attach” may refer to a fixed connection, a detachable connection, or an integral connection, and “bond” may refer to a direct connection or an indirect connection via an intermediate medium. A person skilled in the art will be able to understand the meaning of the above terms in the embodiments of this application depending on the specific circumstances.

[0094] In the description of the embodiments of this application, terms such as "up," "down," "left," "right," "front," and "back" indicate orientation or positional relationships based on those shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the embodiments of this application. They do not imply that the indicated or implied devices or units must have a specific orientation or be configured and operated in a specific direction, and should therefore not be construed as limitations on the embodiments of this application.

[0095] In this specification, terms such as “one embodiment,” “several embodiments,” and “specific embodiments” mean that the specific features, structures, materials, or properties described in relation to that embodiment or example are included in at least one embodiment or example of the embodiments of this application. In this specification, the symbolic expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or properties described may be combined in an appropriate manner in any one or more embodiments or examples.

[0096] The foregoing are merely preferred embodiments of the embodiments of this application and are not intended to limit the embodiments of this application, and various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application shall all be included within the scope of protection of the embodiments of this application.

Claims

1. It's a relay, The relay includes a pair of fixed contact leads, a movable contact assembly, a push rod assembly, a first anti-rotation assembly, and a second anti-rotation assembly. The movable contact assembly includes a movable contact, the ends of which along the first direction are used to contact or separate from a pair of fixed contact lead-outs, the first direction being the direction in which the pair of fixed contact lead-outs are positioned, the movable contact assembly having a first side and a second side facing each other along a third direction, the direction of motion of the movable contact is defined as the second direction, and the first direction, the second direction and the third direction are perpendicular to each other. The push rod assembly includes a contact bracket, the contact bracket having a first side wall and a second side wall provided opposite to each other along the third direction, the first side wall corresponding to the first side surface, and the second side wall corresponding to the second side surface. The first anti-rotation assembly includes a first magnet connected to the first side surface and a second magnet connected to the first side wall, wherein the opposing magnetic poles of the first and second magnets are of the same name. The second anti-rotation assembly includes a third magnet connected to the second side and a fourth magnet connected to the second side wall, wherein the opposing magnetic poles of the third and fourth magnets are of the same name. A relay characterized by the following features.

2. The first side wall has a first inner surface facing the movable contact assembly, and a first outer surface provided facing away from the first inner surface. The second magnet is connected to the first inner surface or the first outer surface. The relay according to claim 1, characterized in that

3. The second side wall has a second inner surface facing the movable contact assembly, and a second outer surface provided facing away from the second inner surface. The fourth magnet is connected to the second inner surface or the second outer surface. The relay according to claim 1, characterized in that

4. The first magnet, the second magnet, the third magnet, and the fourth magnet are permanent magnets. The relay according to claim 1, characterized in that

5. The first magnet, the second magnet, the third magnet, and the fourth magnet are all flat in shape, and the thickness of the first magnet, the second magnet, the third magnet, and the fourth magnet is the same. The relay according to claim 1, characterized in that

6. The push rod assembly further includes a rod portion and a base connected to one end of the rod portion in the axial direction. The contact bracket is connected to the base and forms a space for housing the movable contact assembly enclosed by the contact bracket and the base. The relay according to claim 1, characterized in that

7. The contact bracket further includes a bottom wall, the ends of the bottom wall along the third direction being integrally connected to one end of the first side wall and one end of the second side wall, the contact bracket, the rod portion and the base being connected by injection molding, and the base covering the bottom wall and one end of the first side wall and the second side wall, The push rod assembly further includes a stopper piece, the stopper piece being connected to the other ends of the first and second side walls, and the stopper piece being provided on one side of the movable contact assembly facing the fixed contact lead-out end. The relay according to claim 6, characterized in that it is a relay.

8. The contact bracket further includes a top wall, and both ends of the top wall along the third direction are integrally connected to one end of the first side wall and one end of the second side wall, respectively. The other ends of the first and second side walls are engaged with the base, respectively. The relay according to claim 6, characterized in that it is a relay.

9. The relay further includes a first magnetic conductor, the first magnetic conductor being provided on one side of the movable contact facing the fixed contact lead-out end. The relay according to claim 1, characterized in that

10. The movable contact assembly further includes a second magnetic conductor, the second magnetic conductor being fixedly connected to one side of the movable contact facing away from the fixed contact lead-out end, and the second magnetic conductor being used to form a magnetic circuit with the first magnetic conductor. The relay according to claim 9, characterized in that it is a relay.

11. The aforementioned relay is The present invention further includes an elastic assembly, the elastic assembly being connected to the movable contact assembly and the push rod assembly, and the elastic assembly being used to provide contact pressure. A relay according to any one of claims 1 to 10, characterized in that

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